1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c235b8a9de0a676e2a623d2b075df2f71286a04826648c6b984428e8327e76. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52e5892c-03a1-4d31-bd06-abff5d356024.json and https://artists.proofprofile.net/proofs/artist/52e5892c-03a1-4d31-bd06-abff5d356024.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guíaburros: ¿Con qué filósofo te quedas? (Historia del pensamiento filosófico)
The Worst Pies in London (2023 Broadway Cast Recording)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a56f9de728afce958216e812f83f72052d8e451da62b6a6f49b93a6715679. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH12301788.
Sweeney Todd: The Demon Barber of Fleet Street (2023 Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a80e9236ad38a1a406add934d81537b51778fdc0f2b842725100bf368ef253d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH12301852.
The Ballad of Sweeney Todd (Opening) [2023 Broadway Cast Recording]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a56f9de728afce958216e812f83f72052d8e451da62b6a6f49b93a6715679. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH12301788.
The Music Man (The 2022 Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fb1b1dd9a108ccab94abfc50efb772db5e442cff4775d992b3f5f8c5ef9443. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYRC2200218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff526ffda937d9ca7fbbf376a902ba8294c687c56d89374e3cd5fa4bdac6723. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYRC2200225.
Pick-A-Little, Talk-A-Little / Goodnight Ladies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d847787049db9838249ac67acf5ff932a07e1917a919fae0967a6e28501c80. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYRC2200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1a143bcf739a55f329f8634e8ad7a5d71c54ef89973b5eb55ccb21f33b154d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYRC2200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4f3fab238ed2b9c9990364350c629c75069a19668843b5ef73bb4d5b30994f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYRC2200238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf33c2de2bcde723d8068e19dd291e3728cd0dcafed86c9f27440321958bb68. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYRC2200245.